Antidiagonal sums of the array A380841.

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =35a(5) =237a(6) =2040a(7) =21255a(8) =259591a(9) =3633549a(10) =57320398a(11) =1005959831a(12) =19436938571a(13) =409965565469